Comment by refactor

The nest that drops this little fellow, Razormaw Matriarch's Nest, is found in a cave at the NW boundary of the Wetlands. You can find the entrance to the cave at 69,35. Head inside, and follow the tunnels until you come to a large cavern. The nest is plainly visible on a plateau in the middle of the cavern, right next to the rare npc Razormaw Matriarch. Note that because the npc is a rare spawn it may or may not be there for you, but is not an indication if the nest is there, so check anyway.